why use alcohol to precipitate polysaccharides (levan)

Subject: why use alcohol to precipitate polysaccharides (levan)

Date: Mon Nov 30 09:33:28 2009
Posted by Feng
Grade level: undergrad School: No school entered.
City: Montreal State/Province: No state entered. Country: No country entered.
Area of science: Biochemistry
ID: 1259598808.Bc

Message:


I am reading some papers about bateria polysaccharides, specificaly levan. I 
do not understand why people purified the polysaccharide by alcohol 
precipitation from aqueous solutions (i.e.culture medium), and said that the 
polymer was able to be precipitated by centrifugation. Is water denser than 
alcohol?

Re: why use alcohol to precipitate polysaccharides (levan)

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